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Date: Thu, 13 Apr 2023 05:55:07 -0400 Message-Id: <20230413095507.10620-1-xiaoshoukui@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Cocurrently issue add device requests, btrfs_exclop_balance in btrfs_ioctl_add_dev can race to btrfs_exclop_finish or itself. Link: https://lore.kernel.org/linux-btrfs/20230324031611.98986-1-xiaoshoukui@gmail.com/ --- Changelog: v2: Add check for NONE and btrfs_info. > btrfs_info(fs_info, "fs_info exclusive_operation: %d", > fs_info->exclusive_operation); > ASSERT(fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE || > fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD || > fs_info->exclusive_operation == BTRFS_EXCLOP_NONE); Stack traces: root@syzkaller:/home/xsk# ./repro Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 [ 416.611428][ T7970] BTRFS info (device loop0): fs_info exclusive_operation: 0 Failed to add device /dev/vda, errno 14 [ 416.613973][ T7971] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.615456][ T7972] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.617528][ T7973] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.618359][ T7974] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.622589][ T7975] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.624034][ T7976] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.626420][ T7977] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.627643][ T7978] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.629006][ T7979] BTRFS info (device loop0): fs_info exclusive_operation: 3 [ 416.630298][ T7980] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 [ 416.632787][ T7981] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.634282][ T7982] BTRFS info (device loop0): fs_info exclusive_operation: 3 Failed to add device /dev/vda, errno 14 [ 416.636202][ T7983] BTRFS info (device loop0): fs_info exclusive_operation: 3 [ 416.637012][ T7984] BTRFS info (device loop0): fs_info exclusive_operation: 1 Failed to add device /dev/vda, errno 14 [ 416.637759][ T7984] assertion failed: fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE || fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD || fs_info->exclusive_operation == BTRFS_EXCLOP_NONE, in fs/btrfs/ioctl.c:458 [ 416.639845][ T7984] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 416.640485][ T7984] CPU: 0 PID: 7984 Comm: repro Not tainted 6.2.0 #7 [ 416.641172][ T7984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 [ 416.642090][ T7984] RIP: 0010:btrfs_assertfail+0x2c/0x2e [ 416.642629][ T7984] Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 b9 84 e8 f7 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 c0 af 54 8a e8 cb 49 f3 ff <0f> 0b 66 0f 1f 00 55 48 89 fd e8 95 84 e8 f7 48 89 ef 5d 48 c7 c6 [ 416.644423][ T7984] RSP: 0018:ffffc90003ea7e28 EFLAGS: 00010282 [ 416.645018][ T7984] RAX: 00000000000000cc RBX: 0000000000000000 RCX: 0000000000000000 [ 416.645763][ T7984] RDX: ffff88801d030000 RSI: ffffffff81637e7c RDI: fffff520007d4fb7 [ 416.646554][ T7984] RBP: ffffffff8a533de0 R08: 00000000000000cc R09: 0000000000000000 [ 416.647299][ T7984] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8a533da0 [ 416.648041][ T7984] R13: 00000000000001ca R14: 000000005000940a R15: 0000000000000000 [ 416.648785][ T7984] FS: 00007fa2985d4640(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 [ 416.649616][ T7984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 416.650238][ T7984] CR2: 0000000000000000 CR3: 0000000018e5e000 CR4: 0000000000750ef0 [ 416.650980][ T7984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 416.651725][ T7984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 416.652502][ T7984] PKRU: 55555554 [ 416.652888][ T7984] Call Trace: [ 416.653241][ T7984] [ 416.653527][ T7984] btrfs_exclop_balance+0x240/0x410 [ 416.654036][ T7984] ? memdup_user+0xab/0xc0 [ 416.654465][ T7984] ? PTR_ERR+0x17/0x20 [ 416.654874][ T7984] btrfs_ioctl_add_dev+0x2ee/0x320 [ 416.655380][ T7984] btrfs_ioctl+0x9d5/0x10d0 [ 416.655822][ T7984] ? btrfs_ioctl_encoded_write+0xb80/0xb80 [ 416.656400][ T7984] __x64_sys_ioctl+0x197/0x210 [ 416.656874][ T7984] do_syscall_64+0x3c/0xb0 [ 416.657346][ T7984] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 416.657922][ T7984] RIP: 0033:0x4546af [ 416.658304][ T7984] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00 [ 416.660170][ T7984] RSP: 002b:00007fa2985d4150 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 416.660972][ T7984] RAX: ffffffffffffffda RBX: 00007fa2985d4640 RCX: 00000000004546af [ 416.661714][ T7984] RDX: 0000000000000000 RSI: 000000005000940a RDI: 0000000000000003 [ 416.662449][ T7984] RBP: 00007fa2985d41d0 R08: 0000000000000000 R09: 00007ffee37a4c4f [ 416.663195][ T7984] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa2985d4640 [ 416.663951][ T7984] R13: 0000000000000009 R14: 000000000041b320 R15: 00007fa297dd4000 [ 416.664703][ T7984] [ 416.665040][ T7984] Modules linked in: [ 416.665590][ T7984] ---[ end trace 0000000000000000 ]--- [ 416.666176][ T7984] RIP: 0010:btrfs_assertfail+0x2c/0x2e [ 416.666774][ T7984] Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 b9 84 e8 f7 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 c0 af 54 8a e8 cb 49 f3 ff <0f> 0b 66 0f 1f 00 55 48 89 fd e8 95 84 e8 f7 48 89 ef 5d 48 c7 c6 [ 416.668775][ T7984] RSP: 0018:ffffc90003ea7e28 EFLAGS: 00010282 [ 416.669425][ T7984] RAX: 00000000000000cc RBX: 0000000000000000 RCX: 0000000000000000 [ 416.670235][ T7984] RDX: ffff88801d030000 RSI: ffffffff81637e7c RDI: fffff520007d4fb7 [ 416.671050][ T7984] RBP: ffffffff8a533de0 R08: 00000000000000cc R09: 0000000000000000 [ 416.671867][ T7984] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff8a533da0 [ 416.672685][ T7984] R13: 00000000000001ca R14: 000000005000940a R15: 0000000000000000 [ 416.673501][ T7984] FS: 00007fa2985d4640(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 [ 416.674425][ T7984] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 416.675114][ T7984] CR2: 0000000000000000 CR3: 0000000018e5e000 CR4: 0000000000750ef0 [ 416.675933][ T7984] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 416.676760][ T7984] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 416.677544][ T7984] PKRU: 55555554 [ 416.677885][ T7984] Kernel panic - not syncing: Fatal exception [ 416.678592][ T7984] Kernel Offset: disabled [ 416.679008][ T7984] Rebooting in 86400 seconds.. v1: Didn't check for NONE and BTRFS_EXCLOP_BALANCE_PAUSED status. Stack traces: root@syzkaller:/home/xsk# ./repro Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 Failed to add device /dev/vda, errno 14 [ 69.838916][ T8108] assertion failed: fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE || fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD, in fs/btrfs/ioctl.c:456 [ 69.840759][ T8108] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 69.841461][ T8108] CPU: 0 PID: 8108 Comm: repro Not tainted 6.2.0 #5 [ 69.842245][ T8108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 [ 69.843292][ T8108] RIP: 0010:btrfs_assertfail+0x2c/0x2e [ 69.843899][ T8108] Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 b9 84 e8 f7 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 20 af 54 8a e8 cb 49 f3 ff <0f> 0b 66 0f 1f 00 55 48 89 fd e8 95 84 e8 f7 48 89 ef 5d 48 c7 c6 [ 69.845934][ T8108] RSP: 0018:ffffc90005f1fe28 EFLAGS: 00010282 [ 69.846588][ T8108] RAX: 0000000000000097 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.847426][ T8108] RDX: ffff88801e8b2440 RSI: ffffffff81637e7c RDI: fffff52000be3fb7 [ 69.848267][ T8108] RBP: ffffffff8a533d80 R08: 0000000000000097 R09: 0000000000000000 [ 69.849103][ T8108] R10: 0000000080000001 R11: 0000000000000001 R12: ffffffff8a533d40 [ 69.849945][ T8108] R13: 00000000000001c8 R14: 000000005000940a R15: 0000000000000000 [ 69.850792][ T8108] FS: 00007ff3e2004640(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 [ 69.851747][ T8108] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.852457][ T8108] CR2: 0000000000000000 CR3: 00000000182c8000 CR4: 0000000000750ef0 [ 69.853311][ T8108] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.854167][ T8108] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.854935][ T8108] PKRU: 55555554 [ 69.855263][ T8108] Call Trace: [ 69.855575][ T8108] [ 69.855851][ T8108] btrfs_exclop_balance+0x13c/0x310 [ 69.856337][ T8108] ? memdup_user+0xab/0xc0 [ 69.856749][ T8108] ? PTR_ERR+0x17/0x20 [ 69.857138][ T8108] btrfs_ioctl_add_dev+0x2ee/0x320 [ 69.857716][ T8108] btrfs_ioctl+0x9d5/0x10d0 [ 69.858222][ T8108] ? btrfs_ioctl_encoded_write+0xb80/0xb80 [ 69.858801][ T8108] __x64_sys_ioctl+0x197/0x210 [ 69.859253][ T8108] do_syscall_64+0x3c/0xb0 [ 69.859668][ T8108] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 69.860217][ T8108] RIP: 0033:0x4546af [ 69.860582][ T8108] Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 77 1f 48 8b 44 24 18 64 48 2b 04 25 28 00 [ 69.862533][ T8108] RSP: 002b:00007ff3e2004150 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 69.863299][ T8108] RAX: ffffffffffffffda RBX: 00007ff3e2004640 RCX: 00000000004546af [ 69.864025][ T8108] RDX: 0000000000000000 RSI: 000000005000940a RDI: 0000000000000003 [ 69.864739][ T8108] RBP: 00007ff3e20041d0 R08: 0000000000000000 R09: 00007ffd746cf81f [ 69.865528][ T8108] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff3e2004640 [ 69.866375][ T8108] R13: 0000000000000009 R14: 000000000041b320 R15: 00007ff3e1804000 [ 69.867115][ T8108] [ 69.867411][ T8108] Modules linked in: [ 69.867888][ T8108] ---[ end trace 0000000000000000 ]--- [ 69.868392][ T8108] RIP: 0010:btrfs_assertfail+0x2c/0x2e [ 69.868901][ T8108] Code: 1f 00 41 55 41 89 d5 41 54 49 89 f4 55 48 89 fd e8 b9 84 e8 f7 44 89 e9 4c 89 e2 48 89 ee 48 c7 c7 20 af 54 8a e8 cb 49 f3 ff <0f> 0b 66 0f 1f 00 55 48 89 fd e8 95 84 e8 f7 48 89 ef 5d 48 c7 c6 [ 69.870857][ T8108] RSP: 0018:ffffc90005f1fe28 EFLAGS: 00010282 [ 69.871422][ T8108] RAX: 0000000000000097 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.872148][ T8108] RDX: ffff88801e8b2440 RSI: ffffffff81637e7c RDI: fffff52000be3fb7 [ 69.872866][ T8108] RBP: ffffffff8a533d80 R08: 0000000000000097 R09: 0000000000000000 [ 69.873681][ T8108] R10: 0000000080000001 R11: 0000000000000001 R12: ffffffff8a533d40 [ 69.874530][ T8108] R13: 00000000000001c8 R14: 000000005000940a R15: 0000000000000000 [ 69.875270][ T8108] FS: 00007ff3e2004640(0000) GS:ffff88802cc00000(0000) knlGS:0000000000000000 [ 69.876084][ T8108] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.876681][ T8108] CR2: 0000000000000000 CR3: 00000000182c8000 CR4: 0000000000750ef0 [ 69.877464][ T8108] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.878317][ T8108] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.879062][ T8108] PKRU: 55555554 [ 69.879400][ T8108] Kernel panic - not syncing: Fatal exception [ 69.880096][ T8108] Kernel Offset: disabled [ 69.880563][ T8108] Rebooting in 86400 seconds.. Signed-off-by: xiaoshoukui --- fs/btrfs/ioctl.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index a0ef1a1784c7..7df80b37bc44 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -454,7 +454,9 @@ void btrfs_exclop_balance(struct btrfs_fs_info *fs_info, case BTRFS_EXCLOP_BALANCE_PAUSED: spin_lock(&fs_info->super_lock); ASSERT(fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE || - fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD); + fs_info->exclusive_operation == BTRFS_EXCLOP_DEV_ADD || + fs_info->exclusive_operation == BTRFS_EXCLOP_NONE || + fs_info->exclusive_operation == BTRFS_EXCLOP_BALANCE_PAUSED); fs_info->exclusive_operation = BTRFS_EXCLOP_BALANCE_PAUSED; spin_unlock(&fs_info->super_lock); break; -- 2.20.1