Hello, syzbot found the following issue on: HEAD commit: 40b8e93e17bf Add linux-next specific files for 20250204 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=11c2a3df980000 kernel config: https://syzkaller.appspot.com/x/.config?x=ec880188a87c6aad dashboard link: https://syzkaller.appspot.com/bug?extid=95f1db35defd8524f1dd compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16010df8580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12f078a4580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ccdfef06f59f/disk-40b8e93e.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/b339eaf8dcfd/vmlinux-40b8e93e.xz kernel image: https://storage.googleapis.com/syzbot-assets/ae1a0f1c3c80/bzImage-40b8e93e.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+95f1db35defd8524f1dd@xxxxxxxxxxxxxxxxxxxxxxxxx BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1523 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 9141, name: syz-executor179 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 2 locks held by syz-executor179/9141: #0: ffff8880260a34c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:903 #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: blk_mq_flush_plug_list+0x282/0x1870 block/blk-mq.c:2904 CPU: 1 UID: 0 PID: 9141 Comm: syz-executor179 Not tainted 6.14.0-rc1-next-20250204-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 __might_resched+0x5d4/0x780 kernel/sched/core.c:8766 down_read+0x8e/0xa40 kernel/locking/rwsem.c:1523 i_mmap_lock_read include/linux/fs.h:565 [inline] unmap_mapping_folio+0x284/0x3b0 mm/memory.c:3887 folio_unmap_invalidate+0x122/0x510 mm/truncate.c:557 folio_end_reclaim_write mm/filemap.c:1609 [inline] folio_end_writeback+0x430/0x560 mm/filemap.c:1642 end_bio_bh_io_sync+0xbf/0x120 fs/buffer.c:2766 blk_update_request+0x5e5/0x1160 block/blk-mq.c:983 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145 nullb_complete_cmd drivers/block/null_blk/main.c:1354 [inline] null_handle_cmd drivers/block/null_blk/main.c:1405 [inline] null_queue_rq+0xbb1/0xd60 drivers/block/null_blk/main.c:1645 null_queue_rqs+0x1e7/0x370 drivers/block/null_blk/main.c:1659 __blk_mq_flush_plug_list block/blk-mq.c:2825 [inline] blk_mq_flush_plug_list+0x56a/0x1870 block/blk-mq.c:2904 __blk_flush_plug+0x420/0x500 block/blk-core.c:1213 blk_finish_plug+0x5e/0x80 block/blk-core.c:1240 blkdev_writepages+0xb4/0x100 block/fops.c:460 do_writepages+0x35f/0x880 mm/page-writeback.c:2687 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:694 bdev_disk_changed+0x1f9/0x13f0 block/partitions/core.c:656 blkdev_get_whole+0x2d2/0x450 block/bdev.c:706 bdev_open+0x2d4/0xc50 block/bdev.c:915 bdev_file_open_by_dev+0x1b0/0x220 block/bdev.c:1017 disk_scan_partitions+0x1be/0x2b0 block/genhd.c:374 blkdev_common_ioctl+0x13cf/0x2460 block/ioctl.c:617 blkdev_ioctl+0x4ca/0x6a0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff8ff244ba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3d9b7178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8ff244ba9 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000029a0b R13: 00007ffe3d9b719c R14: 00007ffe3d9b71b0 R15: 00007ffe3d9b71a0 </TASK> ============================= [ BUG: Invalid wait context ] 6.14.0-rc1-next-20250204-syzkaller #0 Tainted: G W ----------------------------- syz-executor179/9141 is trying to lock: ffff888023423870 (&mapping->i_mmap_rwsem){++++}-{4:4}, at: i_mmap_lock_read include/linux/fs.h:565 [inline] ffff888023423870 (&mapping->i_mmap_rwsem){++++}-{4:4}, at: unmap_mapping_folio+0x284/0x3b0 mm/memory.c:3887 other info that might help us debug this: context-{5:5} 2 locks held by syz-executor179/9141: #0: ffff8880260a34c8 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_open+0xf0/0xc50 block/bdev.c:903 #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #1: ffffffff8e938960 (rcu_read_lock){....}-{1:3}, at: blk_mq_flush_plug_list+0x282/0x1870 block/blk-mq.c:2904 stack backtrace: CPU: 1 UID: 0 PID: 9141 Comm: syz-executor179 Tainted: G W 6.14.0-rc1-next-20250204-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_lock_invalid_wait_context kernel/locking/lockdep.c:4828 [inline] check_wait_context kernel/locking/lockdep.c:4900 [inline] __lock_acquire+0x15a8/0x2100 kernel/locking/lockdep.c:5178 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851 down_read+0xb1/0xa40 kernel/locking/rwsem.c:1524 i_mmap_lock_read include/linux/fs.h:565 [inline] unmap_mapping_folio+0x284/0x3b0 mm/memory.c:3887 folio_unmap_invalidate+0x122/0x510 mm/truncate.c:557 folio_end_reclaim_write mm/filemap.c:1609 [inline] folio_end_writeback+0x430/0x560 mm/filemap.c:1642 end_bio_bh_io_sync+0xbf/0x120 fs/buffer.c:2766 blk_update_request+0x5e5/0x1160 block/blk-mq.c:983 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145 nullb_complete_cmd drivers/block/null_blk/main.c:1354 [inline] null_handle_cmd drivers/block/null_blk/main.c:1405 [inline] null_queue_rq+0xbb1/0xd60 drivers/block/null_blk/main.c:1645 null_queue_rqs+0x1e7/0x370 drivers/block/null_blk/main.c:1659 __blk_mq_flush_plug_list block/blk-mq.c:2825 [inline] blk_mq_flush_plug_list+0x56a/0x1870 block/blk-mq.c:2904 __blk_flush_plug+0x420/0x500 block/blk-core.c:1213 blk_finish_plug+0x5e/0x80 block/blk-core.c:1240 blkdev_writepages+0xb4/0x100 block/fops.c:460 do_writepages+0x35f/0x880 mm/page-writeback.c:2687 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:694 bdev_disk_changed+0x1f9/0x13f0 block/partitions/core.c:656 blkdev_get_whole+0x2d2/0x450 block/bdev.c:706 bdev_open+0x2d4/0xc50 block/bdev.c:915 bdev_file_open_by_dev+0x1b0/0x220 block/bdev.c:1017 disk_scan_partitions+0x1be/0x2b0 block/genhd.c:374 blkdev_common_ioctl+0x13cf/0x2460 block/ioctl.c:617 blkdev_ioctl+0x4ca/0x6a0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff8ff244ba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3d9b7178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8ff244ba9 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000029a0b R13: 00007ffe3d9b719c R14: 00007ffe3d9b71b0 R15: 00007ffe3d9b71a0 </TASK> BUG: sleeping function called from invalid context at ./include/linux/mmu_notifier.h:434 in_atomic(): 0, irqs_disabled(): 0, non_block: 0, pid: 9141, name: syz-executor179 preempt_count: 0, expected: 0 RCU nest depth: 1, expected: 0 INFO: lockdep is turned off. CPU: 0 UID: 0 PID: 9141 Comm: syz-executor179 Tainted: G W 6.14.0-rc1-next-20250204-syzkaller #0 Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 __might_resched+0x5d4/0x780 kernel/sched/core.c:8766 mmu_notifier_invalidate_range_start include/linux/mmu_notifier.h:434 [inline] zap_page_range_single+0x386/0x630 mm/memory.c:2015 unmap_mapping_range_vma mm/memory.c:3836 [inline] unmap_mapping_range_tree+0xd7/0x120 mm/memory.c:3853 unmap_mapping_folio+0x30e/0x3b0 mm/memory.c:3889 folio_unmap_invalidate+0x122/0x510 mm/truncate.c:557 folio_end_reclaim_write mm/filemap.c:1609 [inline] folio_end_writeback+0x430/0x560 mm/filemap.c:1642 end_bio_bh_io_sync+0xbf/0x120 fs/buffer.c:2766 blk_update_request+0x5e5/0x1160 block/blk-mq.c:983 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1145 nullb_complete_cmd drivers/block/null_blk/main.c:1354 [inline] null_handle_cmd drivers/block/null_blk/main.c:1405 [inline] null_queue_rq+0xbb1/0xd60 drivers/block/null_blk/main.c:1645 null_queue_rqs+0x1e7/0x370 drivers/block/null_blk/main.c:1659 __blk_mq_flush_plug_list block/blk-mq.c:2825 [inline] blk_mq_flush_plug_list+0x56a/0x1870 block/blk-mq.c:2904 __blk_flush_plug+0x420/0x500 block/blk-core.c:1213 blk_finish_plug+0x5e/0x80 block/blk-core.c:1240 blkdev_writepages+0xb4/0x100 block/fops.c:460 do_writepages+0x35f/0x880 mm/page-writeback.c:2687 filemap_fdatawrite_wbc mm/filemap.c:389 [inline] __filemap_fdatawrite_range mm/filemap.c:422 [inline] filemap_write_and_wait_range+0x283/0x3a0 mm/filemap.c:694 bdev_disk_changed+0x1f9/0x13f0 block/partitions/core.c:656 blkdev_get_whole+0x2d2/0x450 block/bdev.c:706 bdev_open+0x2d4/0xc50 block/bdev.c:915 bdev_file_open_by_dev+0x1b0/0x220 block/bdev.c:1017 disk_scan_partitions+0x1be/0x2b0 block/genhd.c:374 blkdev_common_ioctl+0x13cf/0x2460 block/ioctl.c:617 blkdev_ioctl+0x4ca/0x6a0 block/ioctl.c:687 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff8ff244ba9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 c1 17 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3d9b7178 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff8ff244ba9 RDX: 0000000000000000 RSI: 000000000000125f RDI: 0000000000000004 RBP: 00000000000f4240 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000029a0b R13: 00007ffe3d9b719c R14: 00007ffe3d9b71b0 R15: 00007ffe3d9b71a0 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
